SOLUTION: People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% conf
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Question 610066: People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survey results indicate that the standard deviation is 14.1 books. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 99% confidence? Initial survey results indicate that the standard deviation is 14.1 books.
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n = [z*s/E]^2
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n = [2.5758*14.1/1]^2 = 1320 when rounded up
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Cheers,
Stan H.
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